Electric floor-scrubbing machine.



W. H. STRANGE. ELECTRIC FLOOR SGRUBBING MACHINE. APPLICATION FILED SEPT.8, 1906.

Patented Apr. 25, 1911.

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imm r W MM 1M1 \M E2 W. H. STRANGE. ELECTRIC FLOOR SCRUBBING MACHINE.APPLICATION FILED SEPT, s, 1906.

Patented Apr. 25, 1911.

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arm or nrrn WILLIAM H. STRANGE,

OF CHICAGO, ILLINOIS.

ELECTRIC FLOOR-SCRUBBING MACHINE.

I Specification of Letters Patent.

Patented Apr. 25, 1911.

Application filed September 8, 1906. Serial No. 333.858.

To all whom it may concern:

Be it known that I, VVILLIA H. STRANGE, a citizen of the United States,residing at 3721 Elmwood avenue, in the city of Chicago, county of Cook,and State of Illinois,

have invented a new and useful Improveobject is described in thefollowing specification and illustrated in the accompanylng drawings, inwhich:

Figure 1 1s a side elevation of my improved machine' complete and inposition for connection with an incandescent electric light fixture, orother electric sup-ply. Fig. 2 is a top plan view, the handle beingshown in section on the line 2-2 Fig. 1. Fig. 3 is a vertical-sectionalView on the line 3-3 'Fig. 2. fragmentary detail illustrating the meansfor adjusting the rollers.

In the drawings A designates the frame or casing of an electricmotor.Secured to the bottom of the case A by the screws A is a disk B. Thisdisk is constructed with an annular channel B shaped transversely likean inverted V as shown in Fig. 3. Directly beneath this disk B is anannular .ring C having an annular V shaped channel C corresponding withthe channel B These channels form a race filled with antifriction ballsO which form the horizontal circular bearing on which the weight of theelectric motor rests. The ring 01s supported on the inside of a circularflange D which forms the bottom edge of the cylindrical body D the topedge of which forms a bevel gear D In the interior of the cylindricalbody D are. three adjustable roller bearings D supporting rollers D.These bearings are secured to the body D} each by two screws D extendingthrough the body D One of the holes D for one of the screws for each ofthese bearings is slightly elongated vertically as shown in Fig. 1 and'thereloy'permits one side of each bearing to be ralsedor loweredand'the roller in each of said bearings to be thereby adjusted above thedisk B as to just clear. the disk when the machine is in motion. Theserollers so adjusted are adapted to engage Fig. 4 is an enlarged.

the disk B whenever the machine is tipped on one side or lifted upwardand to thereby prevent a displacement of the ball race and ballstherein. Attached by suitable screws to the bottom of the flange D ofthe cylindrical body D is a ring of wood E. This ring forms a base towhich a-scrubbing brush E is secured as shown, and to which surfacingand polishing tools and materials can be attached either by the woodscrews E as shown, or by any equivalent means. Secured on one end of theshaft F of the electric motor is a beveled pinion F which meshes intothe bevel gear D and transmits the motion of the motor to thecylindrical body D rings .0 and E and the scrubbrush E The pinion F isinclosed in a cover F as shown in Fig. 1. 'Affixed to the top of themotor casing A by screws A is a segmental handle joint G adapted for thepivotal support of a handle. The semicircular edge G of this support isindented with notches G which are adapted in form and arrangement toreceive the end of a locking sleeve hereinafter described. Pivotally.secured to the support G by a pivot bolt G is a fork Gr which forms thepivot end of a handlebar H. Slidable on that end of the handle is asleeve H This sleeve is engaged and pressed down by a coiled spring Hwhich encircles the handle bar and is held in position by the ring Hwhich is secured on the handle by the screw which passes through thering and handle. Under the pressure of this, spring the bottom edge ofthe sleeve is held in the notches in the edge of the segmental joint. Byraising the sleeve the handle is released and can be instantly set atany angle desired as shown in Fig. 1.

The handle bar H is'formed of a tube and is provided at the top end witha suitable hand hold H Just below the hand hold H is an ordinarythreaded incandescent electric globe holder and switch I, adapted forconnection with a suitable cable and plug for the supply and control ofthe electric current. Connected with this holder and switch is a cable Iextending down 1nside the handle bar and through an aperture J. Thiscable is connected with the posts I of the motor as shown in Flg. 1.

The cylindrical cups K are oiling cups for the shaft of the motor, andthe hinged piece M forms part of the casing covering the motor. r

In my device any suitable motor having a horizontal shaft can be used,and I make no claim to such motor or its parts exceptin in the directconnection of the motor shaft to the rotary head by means of the pinionon themotor shaft; and to'the attachment of the handle to the motorcasing as described.

said rollers in said head, and means attached to said head adapted tosupport surfacing,

scrubbing and polishing tools and devices.

2. In a machine of the kind described, the combination with an electricmotor having a horizontal shaft and pinion thereon, and a disk formingthe base of said motor, of a cylindrical gear adapted toinclose andsupport saiddisk, said gear being in mesh with mesh Withsaid pinion,rollers said pinion on said shaft and thereby rotated, meansintermediate of said cylindrical part of said gear and marginal part ofsaid disk adapted-to prevent frictional contact of said parts, meansadjustably secured in said gear adapted to maintain the relativeposition of said disk and sad gear, and ineanssecured to the bottom{fart of said gear adapted to support surfacing, scrub- I bing andpolishing instruments and materials.

3. The combination with an electric motor, its shaft, pinion, casing andcircular base; of a cylindrical gear inclosing said base and inengagement with said pinion,

anti-friction balls intermediate of said gear and said base;. means forkeeping said gear and pinion in mesh, and said balls in place betweensaid base and gear; means on said gear adapted to support surfacing,scrubbing and polishing tools; and a handle secured to said'casing'.

WILLIAM H. STRANGE.

Witnesses:

JOSEPH S'l'AAB,

THOMAS J. MORGAN.

